Temporary header file '/tmp/2hlWZZfgxG/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _FILE_OFFSET_BITS 64
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/squashfuse/cache.h"
  #include "/usr/include/squashfuse/common.h"
  #include "/usr/include/squashfuse/config.h"
  #include "/usr/include/squashfuse/decompress.h"
  #include "/usr/include/squashfuse/dir.h"
  #include "/usr/include/squashfuse/file.h"
  #include "/usr/include/squashfuse/fs.h"
  #include "/usr/include/squashfuse/ll.h"
  #include "/usr/include/squashfuse/squashfs_fs.h"
  #include "/usr/include/squashfuse/squashfuse.h"
  #include "/usr/include/squashfuse/stack.h"
  #include "/usr/include/squashfuse/table.h"
  #include "/usr/include/squashfuse/traverse.h"
  #include "/usr/include/squashfuse/util.h"
  #include "/usr/include/squashfuse/xattr.h"

  // add classes
  _G_fpos64_t* tmp_add_class_0;
  _G_fpos_t* tmp_add_class_1;
  _IO_cookie_io_functions_t* tmp_add_class_2;
  _fuse_off_t_must_be_64bit_dummy_struct* tmp_add_class_3;
  f_owner_ex* tmp_add_class_4;
  file_handle* tmp_add_class_5;
  flock64* tmp_add_class_6;
  fuse_args* tmp_add_class_7;
  fuse_buf* tmp_add_class_8;
  fuse_bufvec* tmp_add_class_9;
  fuse_cmdline_opts* tmp_add_class_10;
  fuse_conn_info* tmp_add_class_11;
  fuse_ctx* tmp_add_class_12;
  fuse_custom_io* tmp_add_class_13;
  fuse_entry_param* tmp_add_class_14;
  fuse_file_info* tmp_add_class_15;
  fuse_forget_data* tmp_add_class_16;
  fuse_loop_config* tmp_add_class_17;
  fuse_lowlevel_ops* tmp_add_class_18;
  fuse_opt* tmp_add_class_19;
  iovec* tmp_add_class_20;
  sqfs* tmp_add_class_21;
  sqfs_inode* tmp_add_class_22;
  sqfs_ll* tmp_add_class_23;
  squashfs_base_inode* tmp_add_class_24;
  squashfs_dev_inode* tmp_add_class_25;
  squashfs_dir_entry* tmp_add_class_26;
  squashfs_dir_header* tmp_add_class_27;
  squashfs_dir_index* tmp_add_class_28;
  squashfs_dir_inode* tmp_add_class_29;
  squashfs_fragment_entry* tmp_add_class_30;
  squashfs_ipc_inode* tmp_add_class_31;
  squashfs_ldev_inode* tmp_add_class_32;
  squashfs_ldir_inode* tmp_add_class_33;
  squashfs_lipc_inode* tmp_add_class_34;
  squashfs_lreg_inode* tmp_add_class_35;
  squashfs_reg_inode* tmp_add_class_36;
  squashfs_super_block* tmp_add_class_37;
  squashfs_symlink_inode* tmp_add_class_38;
  squashfs_xattr_entry* tmp_add_class_39;
  squashfs_xattr_id* tmp_add_class_40;
  squashfs_xattr_id_table* tmp_add_class_41;
  squashfs_xattr_val* tmp_add_class_42;
  statx_timestamp* tmp_add_class_43;
  utimbuf* tmp_add_class_44;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/2hlWZZfgxG/dump1.h"  -I/usr/include/fuse3